Mole Concept And Stoichiometry — Chemistry STD 10 — Question

Electron affinities of two elements A and B are given below:
A = 3.79 electron volts
B = 3.56 electron volts
Which of them will ionize more easily and why?

An oxide which dissolves in both acid as well as base.

Write the equation of the following reaction :
Concentrated sulphuric acid is poured over sugar

Name two substances in the following case:
Contain only ions.

An electrostatic bond between a metallic and a non-metallic ion.

The group of elements having zero valency.

Identify the substance Q based on the information given below:
The pale green solid R turns reddish brown on heating. Its aqueous solution gives a white precipitate with barium chloride solution. The precipitate is insoluble in mineral acids.

An organic compound used as thermometric liquid.

Write an equation for the reaction of hydrochloric acid on caustic soda solution.